Offer arrived, can I still ask for more? after 13 years as a marketing coordinator

I received an offer as a marketing coordinator and I think the pay is a little low. I do not usually post, so bear with me. I have a competing interview next week. Did it backfire?

If they say no, consider asking for something else, such as a review in six months.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.